Re: Odd network issue ... *very* slow scp between two servers
On Sunday 07 March 2004 15:37, Marc G. Fournier wrote: Note that forcing it to 100baseT half-duplex (or 10baseT/UTP half-duplex) corrects the problem ... turns out it is only in full-duplex mode that its hosed ... Did you try a cross-over cable? Actually, you shouldn't even need a cross-over cable for gigabit devices, they should auto-select MDI vs. MDIX. Also, I recall reading something about problems with onboard tx cksum errors on em devices recently; you may want to turn off the tx cksum feature in your testing. Or search the archives for txcsum or something like that. -- Where am I, and what am I doing in this handbasket? Wes Peters [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Odd network issue ... *very* slow scp between two servers
On Sat, 6 Mar 2004, Tim Wilde wrote: On Sat, 6 Mar 2004, Marc G. Fournier wrote: I have two servers on the same network switch, sitting one on top of the other ... one is running an em (Dual-Xeon 2.4Ghz) device, the other an fxp (Dual-PIII 1.3Ghz) device ... Is it a Cisco Catalyst switch? If so, you need to switch the em's to autoselect, on both the server and switch end. For some reason, the em driver will not properly lock down its rate when talking to a Cisco Catalyst switch. At least, I had an identical problem with em's talking to a Catalyst 2950 and that was the fix I came up with. Give it a try and see how your results go. Note that forcing it to 100baseT half-duplex (or 10baseT/UTP half-duplex) corrects the problem ... turns out it is only in full-duplex mode that its hosed ... Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: Odd network issue ... *very* slow scp between two servers
From: Marc G. Fournier [mailto:[EMAIL PROTECTED] On Sat, 6 Mar 2004, Tim Wilde wrote: On Sat, 6 Mar 2004, Marc G. Fournier wrote: I have two servers on the same network switch, sitting one on top of the other ... one is running an em (Dual-Xeon 2.4Ghz) device, the other an fxp (Dual-PIII 1.3Ghz) device ... Is it a Cisco Catalyst switch? If so, you need to switch the em's to autoselect, on both the server and switch end. For some reason, the em driver will not properly lock down its rate when talking to a Cisco Catalyst switch. At least, I had an identical problem with em's talking to a Catalyst 2950 and that was the fix I came up with. Give it a try and see how your results go. Note that forcing it to 100baseT half-duplex (or 10baseT/UTP half-duplex) corrects the problem ... turns out it is only in full-duplex mode that its hosed ... Actually, this is normal behaviour according to the 802.3u spec. If a device in 'auto' mode is connected to one that is forced 100FDX, the auto one will negotiate 100HDX. For example, see HP faq: http://www.hp.com/rnd/support/faqs/2700.htm#question6 http://roger.friendex.net/duplex_mismatch.htm has a nice table of this. --don ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Odd network issue ... *very* slow scp between two servers
On Sat, 6 Mar 2004, Marc G. Fournier wrote: I have two servers on the same network switch, sitting one on top of the other ... one is running an em (Dual-Xeon 2.4Ghz) device, the other an fxp (Dual-PIII 1.3Ghz) device ... Is it a Cisco Catalyst switch? If so, you need to switch the em's to autoselect, on both the server and switch end. For some reason, the em driver will not properly lock down its rate when talking to a Cisco Catalyst switch. At least, I had an identical problem with em's talking to a Catalyst 2950 and that was the fix I came up with. Give it a try and see how your results go. Tim Wilde -- Tim Wilde [EMAIL PROTECTED] Systems Administrator Dynamic Network Services, Inc. http://www.dyndns.org/ ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to [EMAIL PROTECTED]
